Shuttle and mechanism foe operating the same



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2 sheets-sheet 1. l P. oxsGHMIDT. SHUTTLB'AND' MEG'HAYNISM POR OPERATINGTHE SAME. No. 295,291. I Patented Mar, 18, 1884,..

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19.0. SCHMIDT. SHUTTLE AND MBGHAVNISM FOR UPB-RATING THE SAME.

Patelled--Mfnrg 18, 1884,

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FEB-DINAN D OTTO SCHMIDT, OF BERLIN, GERIVIANY.

SHUTTLE AND MECHNISM FOR OPERATING THE SANIVE.

SPECIFICATION forming part of Letters Patent No. 295,291, dated March18, 1884.

application filed June 6, 1583. (No model.) Patented in England November13, 1882, No. 5,413; in France November 14, 185i, No. 152,086, and inGermany December 3, 188:2, No. 23,556.

in part to means for imparting a reciprocatory oscillating motion `tothe said shuttle.

In the drawings, which serve to illustrate my invention, 4Figure 1 is avertical mid-section ofthe shuttle, with its bobbin, on the plane ofline l l in Figs. 3 and Il. Fig. 2 is a side ele- A vation of theshuttle. Fig 3 is a horizontal section on line 3 3 in Figs. l and Fig. 4is a plan of the shuttle, together with the incl osed bobbin andthread-guide. Fig. 5 is an elevation of the thread-guide detached,showing the inside. Fig. 6 is an exterior elevation of the threadguide,shown as il' straightened out in Fig. 7 is Figs. S

order to better illustrate the parts. a plan ofthe thread-guidedetached.

and 9 are respectively a plan and end view of the needle-plate. Fig. lOis a view of the tension-regulating kslide detached. Fig. l1 is alongitudinal section of the mechanism for act-` uating the shuttle, andFig. 12 is a sectional plan of same 'on line I2 l2 in Fig. l1.

The shuttle A is of acup form, and contains the part I call thethread-guide B, and the bobbin or thread-spool C. The shuttle is givenan oscillatory reciprocating movement of more than half a revolution bymeans that will be hereinafter described.

e is the point of the shuttle, which engages the loop ofthe thread atthe needle, and b is a recess in the side of the shuttle, which engages4o a driving-pin, w', on the shuttle-bearing dislr y (see Fig. Il) whenthe shuttle is in place.

In order that the proper access may be had to the interior of theshuttle at all times, no

matter what may be its position, for thread ing, adjusting the tension,Src., I provide large 5o shown.

openings, c and d, in its sides, as indicated in Figs. l, 2, and 3, andin order that the loop of thread may pass over the shuttle withoutchaing, I bevel and smooth off its corners, as In its axis the shuttleis provided guide B from lifting up. The bobbin C is made t to slip ontothe spindle oi' the thread-guide, on

which it is free to rotate; but its movement of rotation is slightlyrestrained by a small leaf spring, i., which rests in a recess in thetubular spindle j" of the guide, and presses outward elasticallv againstthe inner wall of the eye in bobbin G.

I will now describe the thread-guide B more particularly.

On the upper edge of the wall h of this guide is a projection orshoulder, Z, which engages a shoulder, m, on the needleplate m of thesew ing-machine, as best indicated in Fig. 2, whereby the guide B isestopped from rotating with theA shuttle when the latter is operated.The guide B is rotatively mounted on the spindle c ofthe shuttle, butwould move with the shuttle if not restrained in some manner.

In the wall 7L of the thread-guide is an opening, o, in which plays atension-spring, a. This spring is broadest at its free end n', andslightly overlaps the end of opening o. It plays freely)T outward towardthe shuttle-wall. The thread from the bobbin passes out under the end ofthe spring a, and then through the holes p in the walls k of the guide,to provide the necessary tension.

In order to vary the stiffness ci the tensionspring a, and thus regulatethe tension, I ein` ploy a slide, q. (Shown detached in Fig. l0.) Thisslide consists of a bent plate arranged to embrace the wall h of thethread-guide B, and its two sides are connected by ties,which passthrough the opening o above and below the spring a.

In order to prevent the slide g from being shifted accidentally, it isprovided with a leafspring, r, the free end of which passes through anaperture in the slide and presses into slight notches Q at 1" in Fig 6)in the face of the wall 7i, in the manner of a light spring-paw] andratchet. Vhen the slide q is moved toward the free end of spring n, itacts to shorten the operative part ofthe spring and make it stiffer,thus increasing the tension.

IOO

Figs. 11 and 12, premising thatthis mechanism. is so constructed that aquarter-revolution of the driving-shaft s will impart more than half arevolution to the shuttle-bearing disk y.

On the lower end of the vertical1y-arranged driving-shaft s is fixed acrank, t, to which is coupled at u a connecting-rod, c. This rod playsthrough and is guided in a rotativelymounted guideblock, w, and bears onits end a rod, w, mounted to swing radially on a pin, x, in c. The rod wplays through and is guided in a block, y, fixed to thevertically-mounted spindle of the shuttle-bearing disk y. rIhisconstruction is such that the oscillation of crank t through a quarterof a revolution will impart an oscillation to the disk y through morethanhalf a revolution. The shuttle rests loosely on disk y', in orderthat the loop of the thread may pass freely around it 5 but it iscompelled to move with the disk by reason of the engagement of the pinrw within the recess b.

I am aware that broadly it is not new to arrange a thread-guide andbobbin in a cuplike shuttle; but I am not aware that a shuttle havingall the characteristics of mine has ever before been proposed.

I am also aware that mechanism for converting rotary into reverse rotarymotion has been proposed, and that in some respects this rerembles themechanism shown in Figs. 11 and l2; but my mechanism is constructed andarranged to convert an oscillating motion of forty-five degrees into anoscillating motion somewhat in excess of one hundred and eighty degrees.

Having thus described my invention, I claim-` I. The combination of thecup-like shuttle A, provided with a recess, b, and spindle e, thethread-guide B, provided with a tubular spindle, f, with spring c', athread-tension spring, and a spring, o', to press against theshuttle-wall, and the bobbin C, all substantially as set forth.

2. In a sewing-machine, the combination, with the needle-plate of asewing-machine provided with a shoulder, m, of the cup-like shuttle A,provided with a recess, b, the threadguide B, provided with atension-spring, n, and its slide q, and a shoulder, Z, to catch againstthe shoulder on the needleplate, and mechanism, substantially asdescribed, for imparting an oscillating movement to the shuttle, asdescribed.

3. As a means for imparting an oscillatory movement to the shuttle of asewing-machine, the combination of the shaft s, crank t, connectingrodo, guide-block w, radiallymount ed rod zo, block y, and shuttle-bearingdisk y', provided with a shuttle-driving pin, w', all arranged tooperate substantially as set forth.

4. The combination, with a detached cuplike shuttle for asewing-machine, of thethreadguide B, provided with a Vertical side orwall, h, a tenson-spring, n, arranged in an opening in said wall, aratchet, r', a slide, q, and a spring, r, to engage the ratchet, allsubstantially as herein set forth.

FERDINAND OTTO SCHMIDT.

Witnesses:

EDWIN A. BRYDc-Es, ANTHQNY STEFFEN.

